Which sentences uses parentheses correctly?
A: Although Lara was upset (her mother had never called), she still had a great birthday.
B: Mathew wanted to ask her out ( he wanted to ask anyone out really but he lost his nerve.
C: After years of training, Daniel ( finally ran the 100 mile race held each year in Arizona
D: (When Donald looked in the mirror) he saw a man who gad aged ten years in only two years.